Flexing, or bone breaking, is a mix of street dancing and contortionist movements mostly specific to Brooklyn. This video in particular is mesmerizing, almost ritualistic with this group of shirtless guys in gas masks all dancing together in the subway. Other riders seem to either not notice them or look on in a trance.

Flexing, or bone breaking, is a mix of street dancing and contortionist movements mostly specific to Brooklyn. This video in particular is mesmerizing, almost ritualistic with this group of shirtless guys in gas masks all dancing together in the subway. Other riders seem to either not notice them or look on in a trance.